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Which of the following load combination is not possible?(a) Dead load + imposed load + wind load(b) Dead load + imposed load + earthquake load(c) Dead load + wind load + earthquake load(d) Dead load + imposed loadI got this question in a national level competition.Question is from Determination of Wind Loads & Load Combinations in portion Structural Analysis, Loading and Load Combinations of Design of Steel Structures

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Correct option is (c) Dead load + wind load + earthquake load

To EXPLAIN I would say: According to IS code, it is assumed thatmaximum wind load and earthquake load will not OCCUR simultaneously on a structure. The following combination of LOADS with appropriate partial SAFETY factors may be considered : (i)Dead load + imposed load, (ii) Dead load + imposed load + earthquake load or wind load, (iii) Dead load + wind load or earthquake load, (iv) Dead load + erection load.



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